When the packing wears into the packing bore, it creates waves called washboarding. Eventually, the packing bore is so severely washboarded, that the packing will not seal. Washouts and washboarding can be weld repaired, but that drastically reduces the strength of the fluid end.
Our patent-pending design solves the sealing problem by using seals that are engineered to fit precisely into a groove machined into the fluid end. Now the stuffing box sleeve is a sacrificial piece in two places on the inside diameter where the packing seals and the outside diameter are against the fluid end.
As the pump vibrates and pulsates at high pressure, sand gets trapped in the sealing area, and the seals move against the fluid end. Eventually, the seal wears so deeply around the seal bore of the fluid end that it can no longer seal properly. This wear can also be a form of fretting fatigue that can initiate cracking. Typically, weld repairs are made to fix the fluid end sealing problems, but that weakens the fluid end and decreases fatigue life because everything happens at the surface.
Our patent-pending design adds a groove that houses the seal bore seal. Because more than 90 percent of fluid end washouts occur in the packing and suction seal bores, sacrificing the replaceable parts is a much less expensive alternative to replacing the fluid end.
Valve seats can get changed as often as every 40 hours up to 100 hours. It takes many valuable hours to change out valve seats, and the fluid end taper can be damaged by the tools required to change them out. Valve seats made of Tungsten carbide can last five to 10 times longer than traditional seats. This means five to 10 times fewer hours spent changing out seats and lowering the risk of damaging the fluid end taper seat area.
The discharge seal bore wears as it rubs against the seal on the discharge plug. When valve seats get pulled to change out parts, the tools used can damage the seal bore areas. Our patent-pending design creates a groove that houses the seal for the discharge bore. This placement causes the seal to rub against the discharge plug instead of the fluid end and keeps the discharge bore protected from tools that could scar its sealing surface during maintenance.